Flex M

I got a K mount -> NEX reducer for $3.77 delivered a while back. The pics looked exactly like the Roxsen, and that's what it is. Optically it's only good in the center, softer on edges. But I ...

I wonder if there is a way to fine tune adjust the centering of the image circle from the Meike. It just needs a tiny nudge on APSC to be a 100% circle!?

Good point, almost forgot about that! There's no magic, and the Meike produces a circle that is ever slightly cut off on top of frame on APS-C. However it's a 190 degree lens, and the horizon is ...

Yes, that was my original plan to have a circular FE of 220 degrees on the tiny Q! However I've also gone another route recently with the Meike 6.5mm 2.0 circular FE for Sony on an NEX-3N (same ...

I'm the one who posted those diagrams to PF. I've already updated with the files .. thanks! As far as stabilization, idk that it can even work with a circular fisheye? The IR block cover over the ...

I will experiment and let you know. I do think it's bonded somehow. The inner guts (sensor) only cost me $7 delivered, so no loss if it doesn't work out!

Hello Kjeld, sorry for the long delay .. I haven't delved into it just yet. But - I do have some info you may find useful on disassembly of the original Pentax Q: https://kayakfari.wordpress.com/ph ...

I have a similar 220 degree circular fisheye in 12mm board mount that I'd like to work with the Q. Like you, I quickly discovered that it has an ultra short flange focal distance. This means that ...

Yes that would be interesting to know. The phosphors are maybe half a millimeter? Here are the facts: Pentax Auto Bellows M fully extended + 36mm tube Spiratone 35mm 3.5 enlarger lens (at f/8) Pent ...

Ever wonder what the actual pixels on your TV look like? I achieved my goal of a clean super closeup shot of just the three primary color phosphors. Taken with a Spiratone Macrotar 35/3.5 lens on a ...

Ever wonder what the actual pixels on your TV look like? I achieved my goal of a clean super closeup shot of just the three primary color phosphors. Taken with a Spiratone Macrotar 35/3.5 lens on a ...

The circular Sigma fisheye is a nice lens, but expensive as a special use optic imho. If you're not averse to another brand, take a look at the Meike 6mm f/2.0 fisheye in Sony E mount. It's nicely ...

Thanks Barondla! Hardest part @5600mm is finding and keeping the sun in the frame .. the solar glasses helped with that! Focusing is tough, but I'm getting the hang of it. As you know, the Q is ...

The 1000mm reflex had a bigger brother in a 2000mm monster that is much harder to find and big $$$. I'm not aware that Pentax made a 500mm mirror lens, but I personally like the Tamron 500.

These were taken with the SMC Pentax 1000/11 Reflex lens on a Sony APSC (closeups with the Pentax Q): https://kayakfari.wordpress.com/kayakfari-art/art-of-eclipses-and-other-cosmic-alignments/

These are from S Florida with the SMC Pentax 1000/11 Reflex and solar filter. The close ups are at 5600mm equivalent with the original Pentax Q. https://kayakfari.wordpress.com/kayakfari-art/art-of ...